"Before buying a license, I want to know from users if the bot is still useable without getting banned?"
Yes. Only with common sense. The app itself is not detected.

"How long do u run the bot each day? What features do you use? Auto-evolve?"
Your decision. The thread above answers some points. What do you mean with features? List everything you want to know, then we can give you an answer.

"Is gym battling possible with the bot?"
No and will not be.

"Is it still possible to let the bot run 8 hours?"
Yes. Do you want to be banned? Then I would not suggest doing so.